发明授权
- 专利标题: Optical instrument with a continuously adjustable zoom
- 专利标题(中): 光学仪器具有连续可调的变焦
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申请号: US975929申请日: 1993-04-21
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公开(公告)号: US5499066A公开(公告)日: 1996-03-12
- 发明人: John W. Farmer , George Smith , Malcolm Gin , John F. H. Brook , Daryl R. White , Brian A. See , Ian Powell
- 申请人: John W. Farmer , George Smith , Malcolm Gin , John F. H. Brook , Daryl R. White , Brian A. See , Ian Powell
- 申请人地址: AUX
- 专利权人: Remraf Pty. Ltd.
- 当前专利权人: Remraf Pty. Ltd.
- 当前专利权人地址: AUX
- 优先权: AUXPK1934/90 19900824
- 主分类号: A61B3/12
- IPC分类号: A61B3/12 ; G02B15/00
摘要:
An optical instrument for indirectly observing an object includes a first lens system for producing a first image of the object, and an adjustable second lens system for producing a second image of the object. The second lens system is continuously adjustable between a first position wherein the second image has maximum magnification and/or a minimum area of view, and a second position wherein the second image is of a minimum magnification and/or a maximum area of view. In one aspect of the invention, the second lens system is a zoom lens system having two substantially fixed conjugate planes. In another aspect of the invention, the instrument defines a folded optical path through the lens systems which includes a generally U-shaped portion so as, in use, to reduce the separation of the observer and the observed object.
公开/授权文献
- US5953305A Method for detecting mirror signal and the same circuit 公开/授权日:1999-09-14